High-speed milling not only has high machining speed, good machining accuracy and surface quality, but also has low temperature rise (the workpiece is only 3℃) and small thermal deformation compared with traditional cutting, so it is suitable for machining materials sensitive to temperature and thermal deformation (such as magnesium alloy). Because of the small cutting force, it can be applied to the processing of thin-walled and rigid parts; A series of advantages, such as machining hard materials (HRC60), can be realized by reasonably selecting tools and cutting parameters. Therefore, high-speed milling technology is still a research hotspot at present, and it is developing in the direction of higher agility, intelligence and integration, becoming the third generation modeling technology.